Compiler warning fixes

CollectAgent/sensorcache.cpp

@@ -198,7 +198,7 @@ bool CacheEntry::checkValid() {
     if (_cache.size() > 2) {
         TimeStamp ts;
         // Cache element right after cacheIndex is the oldest entry (circular array)
-        uint64_t ctr = (_cacheIndex + 1) % _cache.size();
+        int64_t ctr = (_cacheIndex + 1) % _cache.size();
         uint64_t prev = _cache[ctr].timestamp;
         // We compute the average sampling period for this specific sensor
         uint64_t avg = 0;
@@ -230,7 +230,7 @@ int64_t CacheEntry::getAverage(uint64_t avg) {
         }
 
         double sum = 0;
-        uint64_t it, prev;
+        int64_t it, prev;
         prev = _cacheIndex;
         it = older(prev);
         // We compute the weighted average of elements in the cache that fall within the specified window
@@ -286,8 +286,8 @@ int64_t CacheEntry::getOffset(int64_t t) {
     if(!_stable || t < 0)
         return -1;
     else {
-        int64_t offset = ( ( _cache.size() * t ) / ( getLatest().timestamp - getOldest().timestamp ) ); //- 1;
-        if(offset > _cache.size())
+        int64_t offset = ( ( (int64_t)_cache.size() * t ) / ( getLatest().timestamp - getOldest().timestamp ) ); //- 1;
+        if(offset > (int64_t)_cache.size())
             return -1;
         return ( _cache.size() + _cacheIndex - offset ) % _cache.size();
     }

CollectAgent/simplemqttserverthread.cpp

@@ -333,7 +333,7 @@ void SimpleMQTTServerMessageThread::run()
        * Apparently, there is work to do...
        */
       if (numfds > 0) {
-          for (int connectionId=0; connectionId<this->_maxConnPerThread; connectionId++) {
+          for (unsigned connectionId=0; connectionId<this->_maxConnPerThread; connectionId++) {
               if (fds[connectionId].fd != -1) {
 #ifdef SimpleMQTTVerbose
                   coutMtx.lock();
@@ -486,7 +486,7 @@ void SimpleMQTTServerMessageThread::assignConnections()
       return;
     }
 
-    for (int i=0; i<this->_maxConnPerThread; i++) {
+    for (unsigned i=0; i<this->_maxConnPerThread; i++) {
       if (fds[i].fd == -1) {
         fds[i].events = POLLIN | POLLPRI | POLLHUP;
         fds[i].revents = 0;

CollectAgent/simplemqttserverthread.h

@@ -54,7 +54,7 @@ class SimpleMQTTServerMessageThread : SimpleMQTTServerThread
 {
 protected:
   uint64_t _maxConnPerThread;
-  int numConnections;
+  unsigned numConnections;
   struct pollfd* fds;
   SimpleMQTTMessage** msg;
   int *fdQueue;